Sash-lock.



DNTTED STATES PATENT OFFICE.Y

WILLIAM TBESSELT, OF NEW YORK, N. Y.

SASI-I-LOCK.

To all whom t may concern:

Be it known that I, VILLIAM Tnnssun'r, a citizen of the United States, residing in the city of New Y rk, borough of lifanhattan, in the county and State of New York, have invented a certain new and useful improve nient in Sash-Locks, of which the following is a specification.

The invention relates to fasteners applied on the meeting-rails of window sashes to lock the latter, and the primary object of the invention is to provide such fastener with a key-operated locking means by which the sashes may be securely fastened until released by a key.

Another important object is to provide a construction in which the fastener members are secured to their' respective meeting-rails by means which are concealed and inaccessible when the fastener is locked, and genen ally, to provide a sash lock which shall hold reliably, lock automatically, and bc easily applied and operated.

The invention consists in certain novel features of construction and arrangement by which the above objects are attained, to be hereinafter described.

The accompanying drawings form a part of this specification and show an approved form of the invention.

Figure l is a Vplan view of the sash lock in position on the meeting-rails, in the engaged and locked condition. Fig. 2 is a similar view showing the parts unlocked. Fig. 8 is a side view corresponding to Fig. l. Fig. t is a front elevation of the same. Fig. 5 is a vertical section taken on the line -5 in Fig. l. Fig. G is a vertical section through a portion, on the line G-G in Fig. 2. Fig. 7 is a horizontal section through the locking device alone, taken on an irregular line. Fig. 8 is an elevation of the lock cylinder.

Similar letters of reference indicate the same parts in all the figures.

A and B are the meeting-rails of the upper and lower sashes respectively. On the rail A is a short strip or bar C' fastened by screws G1 extending downwardly therethrough into the rail, and covered by a similar bar or cover-plate C2 hinged to the bar at C3. The cover carries a hook C4 adapted to be engaged by a portion on the movable member of the sash fastener. On the side opposite to the hinge C3 is a spring-catch G5 fastened to the bar beneath the rear face Specification of Letters Patent.

Application filed October 24, 1913.

Patented May 19, 1914.

sei-iai no. 797,005.

of the latter, and having a beveled nose C adapted to engage and hold the rear edge of the cover C2 against lifting until released. Thus constructed the screws holding the hook to the meeting-rail cannot be removed while the hook C'L is in engagen'ient with the other member of the sash lock.

@n the rail D a plate D having a broad base D1 and a circular cavity in its upper face in which is received the locking cylinder E held in place by the vertical rivet D2 on which it may be rot-ated horizontally. The cylinder carries a semi-circular flange or cam El having an upwardly inclined or spiral edge E2 adapted to engage beneath the hook C* when the cylinder is partially rotated in one direction and draw the meetting-rails together and hold them fastened, and when rotated in the reverse direction to withdraw from engagement with the hook and release the sashes. A thu1nb-piece E3 is provided for facilitating the movement, and a pin Df set in the plate D serves as a stop to limit the movementl in each direction to about a half revolution. A semicircular slot e in the cylinder affords access to a screw DL extending through the bottom of the plate D into the rail B, when the cylinder is rotated to disengage the flange El, and when the cylinder is in the locked condition the screw is concealed beneath the closed portion of the cylinder and is inaccessible. This screw DL and the screws D5 extendingY through the base D1, hold the plate and its cylinder to the rail.

The locking means for holding the flange and hook in engagement is of the wellknown Yale type. A channel Z in the front portion of the plate D receives a key F, indicated in dotted lines in Fig. 7, having the usual swells in its edge adapted to act upon movable pins extending into the channel or key-way. Three pins G are shown, arranged parallel with each other and extending horizontally across the curved line of the joint between the cylinder E and the cavity in which it is mounted on the plate D. The pins are cut transversely to match suoli joint, the cut being curved to correspond to the curve of the joint, and each pin is urged toward the key-way by its spring G1 in the cylinder.

To permit free rotation the pins are arranged out of line on the circumference of the cylinder, one above the other, as shown in FiO. 8, so that the portion of each pin FSO which travels with the cylinder will find its own mate in the plate D Without interference with either of the others. The keyway CZ is correspondingly inclined, as indicated in dotted lines in Fig. 4l. The keyway is formed partly in the body of the Vplate D and partly in a removable cap I-I secured to the plate by concealing screws H1 extending from the lower face of the plate upwardly into the cap. By the removal of the latter access is had to the pins G, and the construction also p-ermits the holes for the pins to be conveniently drilled from the exterior of the plate.

'Vhen the cylinder is rotated to the locked position the pins G are automatically thrust forward across the joint, and the cylinder securely held with its ange El engaged beneath the hook Ci until the key is inserted and the pins forced inwardly thereby to bring their cuts into coincidence with the joint. The cylinder may then be rotated in the reverse direction to release the iange from the hook.

While in the locked condition the screws C1 are inaccessible and cannot be removed, and the screw D* holding the plate D to its rail is concealed beneath the cylinder E. Thus conditioned the sashes are eiitectually locked together and held until the insertion of the key releases the mechanism.

Any number of pins may be employed arranged in a variety of ways and of varying lengths to insure against unauthorized opening, as will be understood, or one pin alone may be used in less expensive forms of the invention; or other types of locking mechanism may be employed. The bar C and its cover C2 may be in a single piece with the hinge and catch omitted, and secured to the rail as usual, and the plate D secured to its rail by screws extending through the base, with the concealed screw Dt omitted. The complete form shown is preferred.

Other modications may be made in the forms and proportions without departing from the invention.

I claim l. In a sash lock, a bar, screws adapted to extend downwardly therethrough into a meeting-rail, a cover hinged to said bar and concealing said screws, a hook on said cover, a plate adapted" to be secured to the other meeting-rail, and a movable member on said plate, adapted to engage said hook and hold said cover against lifting and exposing said screws.

2. In a sash lock, a bar, screws adapted to extend downwardly therethrough into a meeting-rail, a cover hinged to said bar and concealing said screws, a hook on said cover, a plate adapted to be secured to the other meeting-rail, a movable member on said plate, adapted to engage said hook and hold said cover against lifting and exposing said screws, and a movable catch engaged with said cover.

3. In a sash lock, a plate adapted to be secured to one of a pair of meeting-rails and having a circular recess, a cylinder rotatably mounted in said recess, an inclined key-wav in said plate, a plurality of spring-actuated pins arranged at different levels corresponding to the inclination of such keyway, said pins extending from said keyway into said cylinder and adapted to lock said cylinder to said plat-e, and cut transversely to match to the joint between said cylinder and plate when presented thereto by the action of a key inserted in said key-way, and means adapted to be secured to the other meeting-rail and engage said cylinder when the latter is in the locked position.

In testimony that I claim the invention above set forth I ai'lix my signature, in presence of two witnesses.

HELEN V. Rien.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner oi Patents, Washington, D. C. 

